Joseph best



(No Model.)

- J. BEST.

APPARATUS FOR ELECTRIC LIGHTING.

N0. 2'45Q933. 'Patentd Au 23,1881.

N. PETERS. FhclwLithographer, Wnsmn mn, D. C. i

UNITED STATES PATENT OEEIcE.

JOSEPH BEST, OF MONTREAL, QUEBEC, CANADA.

APPARATUS FOR ELECTRIC LIGHTING.

SPECIFICATION forming part of Letters Patent No. 245,933, dated August 23, 1881.

Application filed March 9, 1881. (No model.)

To all whom "it may concern:

Be it known that I, JosEPH BEs'r, of the city of Montreal, in the District of Montreal and ProvinceofQuebec,Canada,haveinve-nteil certain new and useful Improvements in Apparatus for Electric Lighting; and I do hereby declare that the following is a full, clear, and exact description of the same.

The invention may be described as consisting of an arrangement in which the two carbons inclined toward each other are mounted upon horizontal rock-shafts, which are so operatedbythe currentfrom the dynamo-electric machine as to slightly separate the points of the carbons and produce a voltaic arc. The angle of inclination of the carbons to each other can be regulated while the carbons are being consumed by suitable means provided for the purpose.

Forfullcomprehension of the invention reference must be had to the annexed drawings, in which- Figure l is a plan view of the apparatus; Fig. 2, a sectional elevation of same; Fig. 3, a View of the carbon socket or holder, and Fig. 4 detail of device for adjusting armature.

Similar letters of reference indicate like parts.

A is the box or casein which. the mechanism is contained, and of any suitable material, B being the wire conveying the positive current from the dynamo-electric machine to the electro-magnet G, formedin the usual way, whence it passes, as at B, to a plate, D, securely mounted on a rock-shaft, D, carried in proper hearings in the box A.

E is a similar rock-shaft, also provided with a plate, E, from which the wire marked B returns to the dynamo-electric machine.

F and G are the carbon-sockets, mounted, respectively, on the shafts D and E, f and 9 indicating, respectively, the positive and negative carbons. These carbon-holders are preferably constructed as shown in Fig. 3. F is the butt, provided with eye so as to be slipped on the shaft, F being a trough-shaped extension of same, on which is mounted a bridge, F F is an angle-piece, somewhat smaller in section than F slipped over the carbon laid in the trough F and cramped so as to hold it firmly by a set screw passing through the bridge F The whole carbon socket or holder is secured adj ustabl y on its shaft by a setscrew or by any like means.

H is an armature or armature-lever, constructed as shown specially in Fig. 2, and provided with an insulating-strip, H, kept by the action of a spring, I, secured to the box always in contact with the face of a friction-sector, K, mounted rigidly on the shaft E. This armature-lever H is, where it passes over the electro-magnet O, perforated or slotted, so as to allow ot' the passage up through it ofthe pin 0 projecting from said magnet, and is sup- I ported as will now be described and as is shown particularly in Fig. 4. In the top of the box is formed a socket, L, into which is dropped a screwed pin, M, on the lower end ofwhich is formed or secured a support or fork, M, carrying a pin, N, upon which the armature rests. Ajam-nut, L, threaded to pin M, serves to raise or lower said pin, and thus vary the position of the armature.

O and O are geared sectors corresponding with each other, and mounted,respectively,on the shafts D and E, the'latter being insulated, as shown at e, by any suitable material.

The operation of the invention is as follows: The parts being in the position shown in Figs. 1 and 2, the current produced, as mentioned, by any dynamo-electric machine passes along the wire B to the electro-magnet O, and thence through E to the plate D, and to the point of the positive carbon; then in contact with that of the negative carbon, thus igniting the same.

The current then passes off through the wire B back tothe dynamo-electric machine, theinsulator e breaking the circuit. Simultaneously with this action the armature H is attracted to the electro-magnet 0, thereby overcoming the resistance of the spring I and causing the insulating-piece H in contact with the frictionsector K to draw upon and slightly rotate it and the shaft E, on which it is mounted. Through the geared sectors 0 and 0 this action is synchronously conveyed to the shaft D, turning it in the reverse direction, thus separating the points of the carbons and producing the voltaic arc.

By means of the screwed spindle M the potoo sition of the fork carrying the armature may be varied vertically, and the amount of 1ever age exercised by the armature H upon the friction-sector K be thus adjusted.

The carbon-holders F and G may, before the current is thrown on, be set at any angle on the rock-shafts, and their construction, with the loose angle-piece clamped down upon the carbon, afiords a very firm hold, prevents any lateral deviation, and allows thedifl'erentsizes of carbons to be used with equal facility.

It will of course be understood that for any of the elements of the invention corresponding mechanical equivalents may be substituted as, for instance, pulleys and a twisted belt for gears, &c.

lVhat I claim, and desire to secure by Letters Patent, is as follows:

1. In an apparatus for electrical lighting, the carbons and horizontal rock-shafts provided JOSEPH BEST.

Witnesses:

FRAS. HY. REYNOLDS, R. ARTHUR KELLOND. 

